A model of queues Suppose there are two types of patients: U-patients:those for whom the surgery would be very useful W-patients:those for whom the surgery would only be marginally useful Let Up represent poor patients for whom surgery would be useful Surgeon Bhattacharya,Hyde and Tu-HealthEconomics Bhattacharya, Hyde and Tu – Health Economics A model of queues  Suppose there are two types of patients:  U-patients:those for whom the surgery would be very useful  W-patients: those for whom the surgery would only be marginally useful  Let Up represent poor patients for whom surgery would be useful